Bosch Plena Message Manager LBB1965/00

Product Description

• Highly flexible stand-alone digital message player

• Up to 12 messages and 12 trigger inputs

• Downloads messages from a PC in WAV format

• Compliant with standards for emergency sound systems

• Zone control for Plena system preamplifier LBB 1925/10

• The Plena message manager is a high performance,highly versatile stand-alone digital message player

• Applications range from spot announcements in supermarkets and theme parks to warning and evacuation messages in emergency situations

• Functions

• Messages

• Up to 12 messages can be stored in the internal 64Mbit EEPROM,without the need for data retention battery backup

• Each message can have any length within the total available capacity

• A PC uploads messages and configurations via RS-232 to the unit,which can then operate without a PC

• The standard WAV format is used for messages with sample rates of 8 kHz to 24 kHz with 16-bit word length (linear PCM)

• This gives up to 500 seconds of recording time with a CD-quality signal-to-noise ratio

• The use of linear PCM instead of a compressed audio format,such as MP3,ADPCM and u-law/A-law,ensures high-quality playback of all types of audio signals,including sound effects and special tones,such as attention chimes

• The unit has 12 contact closure trigger inputs for announcements

• Each can be configured for a sequence of up to four messages from those available

• In this way messages can be used in combination with other messages, optimizing flexibility and storage space usage

• When used together with the six-zone LBB 1925/10 Plena System Pre- Amplifier,a zone selection can be configured for each trigger input

• The message manager communicates this selection to the LBB 1925/10 via an RS-232 connection

• Continuous activation of a trigger input causes the corresponding message sequence to repeat

• Trigger Inputs

• The trigger inputs have a serial priority,i.e., input 1 has priority over input 2, input 2 over input 3,etc

• The high priority trigger inputs 1-6 are only accessible as contacts on the rear panel to prevent accidental use

• The lower priority trigger inputs 7-12 are also available as trigger switches on the front panel

• Integrity And Dependability

• The LBB 1965/00 can also play emergency/evacuation messages,as it fulfills the IEC 60849 standard

• The microcontroller continually checks the data integrity of the system,and a watchdog circuit,in turn,checks the microcontroller

• The unit monitors the D/A converter with a pilot tone,and the high priority trigger inputs (one to six) for cable short circuits and breaks

• A 24 V battery backup connection with automatic fail-safe provides continued operation if the mains power should fail

• A 20 kHz pilot tone can be mixed with the output signal to supervise the link to the next amplifier

• This also works for loudspeaker supervision in combination with 20 kHz detectors

• Any failure causes a red LED fault indication,and activates a fault output contact

• Loop-Through Facility

• The LBB 1965/00 provides a loop-through facility with balanced XLR and unbalanced cinch inputs and outputs

• This allows the unit to be inserted into an existing audio link

• As long as no announcements are playing,the signal input is routed to the output

• If an announcement begins,the input signal is interrupted and the announcement is routed to the output

• Updating

• Messages and configuration settings are uploaded from a PC

• After uploading,the trigger inputs 7-12 can be configured by using the front panel switches,without the need for a new upload or even a PC

• Message content can be monitored using the available headphone jack

Product Specification

Other Details